CN101880124B - Annealing and cooling treatment system for two-stage hot wind circulation of glass ceramic tunnel crystallization kiln - Google Patents
Annealing and cooling treatment system for two-stage hot wind circulation of glass ceramic tunnel crystallization kiln Download PDFInfo
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- CN101880124B CN101880124B CN2010101903657A CN201010190365A CN101880124B CN 101880124 B CN101880124 B CN 101880124B CN 2010101903657 A CN2010101903657 A CN 2010101903657A CN 201010190365 A CN201010190365 A CN 201010190365A CN 101880124 B CN101880124 B CN 101880124B
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Abstract
The invention belongs to the technical filed of glass ceramic annealing by a sintering method, and discloses an annealing and cooling treatment system for two-stage hot wind circulation of a glass ceramic tunnel crystallization kiln. The treatment system is characterized in that the upper part and the lower part of kiln walls at two sides of a quench zone are respectively installed with a row of fast cold wind blowing openings which are communicated with fast cold wind blowing opening branch pipes, the fast cold wind blowing openings are all communicated with the output ports of second hot wind circulation pipes; the kiln walls at two sides of the slow cooling segment of a cooling zone are respectively provided with three rows of hot circulation wind blowing openings which are communicated with the hot circulation wind blowing opening branch pipes, all hot circulation wind blowing opening branch pipes are communicated with the output ports of first hot wind circulation pipes; the first hot circulation wind suction opening blowing branch pipes are all communicated with the input ports of the first hot wind circulation pipes; and the second hot circulation wind suction opening blowing branch pipes are all communicated with the input ports of the second hot wind circulation pipes. The annealing and cooling treatment system can improve product quality, and reduce deformation, burst and other defects of the products.
Description
Technical field
The invention belongs to the annealing technology field of sintering process sytull, specifically, it relates to the annealing and the cooling treatment system of sintering process glass ceramic tunnel crystallization kiln.
Background technology
Known building decoration sytull sintering crystallization process is: the glass particle material is tiled in the mould that is combined into by refractory materials, pushes and carries out sintering, crystallization, annealing and processing under cooling in the kiln.Its furnace construction form reference be traditional ceramic roller kiln, therefore, the method for cooling that the type of cooling of product usually adopts directly, combines indirectly in this tunnel.Product can chilling in 1120 ℃ to 950 ℃ scopes; Stop that by chilling freezing air that air curtain sprays into is with the product chilling; Be the slow cooling stage from 850 ℃～400 ℃; Extract mouth out with the product cooling by the hot blast that is distributed in this section, the kiln tail then directly blasts cold wind, makes product be chilled to 50 ℃ of left and right sides kiln discharges by 400 ℃.This type of cooling tend to cause the cooling section hot gas flow stir not enough, difference of temperature in cross section of kiln is excessive, rate of cooling is difficult for regulating, annealing is insufficient, occurs the disconnected plate of product easily, bursts, and causes problems such as yield rate is low.
The fundamental property of the existing glass of building decoration sytull has the polycrystalline characteristic of pottery again, has concentrated the characteristics of glass with pottery.Owing to have glassy phase and crystalline phase simultaneously in the sytull; They have either large or small difference at aspects such as thermal expansivity, transition temperature, mechanical property, microtextures, and the difference of these character must cause the structural stress of generation at the interface in glassy phase and crystalline phase.
In addition, this product adopts multilayer sign indicating number frame mode when the sintering crystallization, be generally 5～9 layers, and certain interval is arranged between every layer; Product thickness is also thicker, is generally 10mm～20mm; The area of monolithic product is also bigger, is generally 1～4m
2Therefore, in the annealing process of cooling of product, tend to produce the upper and lower in the bigger kiln, product limit portion and middle part and product surface and inner this three big temperature difference.The excessive temperature difference of its kiln space section can make the product rate of cooling of different layers differ greatly, and causes product to shrink inconsistent and generation buckling deformation or cracking.With regard to the surface and inside of one monolithic sheet, in process of cooling, upper surface directly contacts with mobile gas; Speed of cooling is very fast, and lower surface then contacts with the very strong refractory materials of heat storage capacity, and speed of cooling is relatively slow; Therefore; Lower surface annealing effect always is better than upper surface, is reflected on the structure of glass, and the pairing temperature of the glass structure that upper surface layer kept will be higher than the pairing temperature of undersurface layer structure; This is greater than the shrinkage of upper surface layer glass with regard to the shrinkage that has caused undersurface layer glass, thereby glass board material is deformed.Simultaneously, in process of cooling, often product limit portion speed of cooling is too fast, and the centre is slower, and the even and thermal stresses that produce of inhomogeneous cooling can not be leaned on the viscous of particle to flow and eliminate, also can cause the product cracking when stress is excessive.Particularly after high fire insulation, being quenched to temperature is that 850 ℃～550 ℃ these stages are particularly crucial, and at this moment, the existing stress of crystallizing glass sheet material has tension stress again, and the unsuitable excessive and cooling of rate of cooling is here wanted evenly.
Summary of the invention
The object of the present invention is to provide a kind of annealing and cooling treatment system of two sections hot air circulation of glass ceramic tunnel crystallization kiln, this annealing and cooling treatment system can improve the quality of products.
For realizing above-mentioned purpose; The technical scheme that the present invention adopted is: the annealing and the cooling treatment system of two sections hot air circulation of glass ceramic tunnel crystallization kiln; It comprises the annealing of tunnel crystallization kiln and the kiln body of cooling treatment system, by the TR division quench zone, cooling zone slow cooling section, first cooling zone, second cooling zone, kiln tail cooling section is arranged from the outlet of clinkering zone heat preservation zone to kiln tail in the kiln body, and 1120 ℃～950 ℃ intervals are quench zone; 850 ℃～550 ℃ intervals are the cooling zone slow cooling section; 500 ℃～250 ℃ intervals are first cooling zone, and 250 ℃～150 ℃ intervals are second cooling zone, and 150 ℃～50 ℃ intervals are kiln tail cooling section; The top and the bottom of the both sides kiln wall of quench zone are equipped with the chilling air port, and the chilling air port is connected with chilling wind arm, and all chilling wind arms are connected with the chilling airduct, and the chilling airduct is connected with the delivery port of chilling blower fan; Be respectively equipped with kiln tail cooling vent on the both sides kiln wall of kiln tail cooling section; Kiln tail cooling vent is connected with kiln tail cooling vent arm; Kiln tail cooling vent arm is provided with regulated valve; All kiln tail cooling vent arms all are connected with the output port of kiln tail cooling tube, and the input port of kiln tail cooling tube is connected with the output port of kiln tail cooling blower; It is characterized in that:
The Yao Qiang top, both sides of quench zone (kiln top with upper strata product between) and Yao Qiang bottom, both sides (between kiln vehicle surface and the lower floor's product) are respectively installed row's chilling wind winding-up mouthful, the chilling wind of the chilling wind winding-up on Yao Qiang top, both sides mouthful and Yao Qiang bottom, the both sides mouth employing staggered arrangement form of jetting; Chilling wind winding-up mouthful is connected with a chilling wind winding-up mouthful arm, and each chilling wind winding-up mouthful arm is provided with regulated valve, and all chilling wind winding-up mouth arms all are connected with the output port of the second hot air circulation pipe, and the second hot air circulation pipe is provided with the chilling blower fan;
Be respectively equipped with three heat extraction recirculating airs winding-up mouth on the both sides kiln wall of cooling zone slow cooling section; First heat extraction recirculating air winding-up mouth is positioned at the upper end that product is piled up the zone; Second heat extraction recirculating air winding-up mouth is positioned at the middle part that product is piled up the zone, and the 3rd heat extraction recirculating air winding-up mouth is positioned at the bottom that product is piled up the zone; Thermal cycling wind winding-up mouth is connected with a thermal cycling wind winding-up mouthful arm; A thermal cycling wind winding-up mouthful arm is provided with regulated valve; All thermal cycling wind winding-up mouthful arms all are connected with the output port of the first hot air circulation pipe, and the first hot air circulation pipe is provided with heat-resisting recirculation blower;
Be respectively equipped with three on the both sides kiln wall of first cooling zone and ranked first thermal cycling wind suction opening; First ranked first thermal cycling wind suction opening is positioned at the upper end that product is piled up the zone; Second ranked first thermal cycling wind suction opening is positioned at the middle part that product is piled up the zone, and the 3rd ranked first thermal cycling wind suction opening is positioned at the bottom that product is piled up the zone; The first thermal cycling wind suction opening is connected with the first thermal cycling wind suction opening arm, and the first thermal cycling wind suction opening arm is provided with regulated valve, and all first thermal cycling wind suction opening arms all are connected with the input port of the first hot air circulation pipe;
Be respectively equipped with three on the both sides kiln wall of second cooling zone and ranked second thermal cycling wind suction opening; First ranked second thermal cycling wind suction opening is positioned at the upper end that product is piled up the zone; Second ranked second thermal cycling wind suction opening is positioned at the middle part that product is piled up the zone; The 3rd ranked second thermal cycling wind suction opening is positioned at the bottom that product is piled up the zone; The second thermal cycling wind suction opening is connected with the second thermal cycling wind suction opening arm, and the second thermal cycling wind suction opening arm is provided with regulated valve, and all second thermal cycling wind suction opening arms all are connected with the input port of the second hot air circulation pipe.
The input terminus of described heat-resisting recirculation blower (input aperture) is provided with heat-resisting recirculation blower air distribution outlet.
The sytull product that bakes gets into the cooling zone quench zone from the clinkering zone heat preservation zone, and higher because of glass-ceramic plate and refractory temperatures, product is in plastic state, can force cooling by the blowing of chilling blower fan.Because crystallizing glass sheet material thickness is thicker, area is bigger, produces cracking herein for fear of product; Be difficult for directly blowing the normal temperature air cooling, and adopt the warm air that extracts 250 ℃～150 ℃ of intervals of cooling zone to cool off, the type of cooling is the anxious formulas of blowing in top and the bottom; Promptly (kiln top with upper strata product between) and bottom (between kiln vehicle surface and the lower floor's product) are respectively installed one and are arranged the chilling wind mouth of jetting and cool off on Yao Qiang top, kiln body both sides; The oral sex of jetting up and down is wrong arranges, forms the chilling air curtain herein one, has both reached the purpose of chilling; Prevent that again product from producing cracking because of sharply cooling off, can stop the hot gas of clinkering zone to flow simultaneously to cooling zone.Because the effect of vacuum fan, this moment, the warm air of cooling zone was moved to the kiln tail by the chilling place, took out the exit to hot blast and was extracted out by cooling blower, formed first section hot air circulation thus.Product behind chilling gets into 850 ℃～550 ℃ intervals of cooling zone and is slowly annealed by the warm air that heat-resisting recirculation blower extracts 500 ℃～250 ℃ of intervals of cooling zone; Its mode is: pile up on the region height direction by position, upper, middle and lower staggered arrangement three thermal wind exhaustings winding-up mouth at the product of this both sides, interval kiln wall; Also be provided with hot blast in 500 ℃～250 ℃ intervals of cooling zone and extract mouth out; Its arrangement form is identical with 850 ℃～550 ℃ intervals; This arrangement form can form the strong disturbance of hot gas flow on the transverse section in kiln, dwindle the temperature difference, in kiln, also can regulate annealing rate easily on the length direction; Equally, because the effect of heat-resisting recirculation blower forms second section hot air circulation.Be provided with air distribution outlet at the heat resisting exhauster hot-wind inlet, to regulate the temperature that gets into air in the blower fan.Simultaneously, the gas vol that this annealing way can make cooling zone blast and extract out reaches balance, thereby does not disturb clinkering zone.
The invention has the beneficial effects as follows: adopt two sections hot air circulation annealing technologies, strengthened the hot gas flow stirring, increased the convective heat exchange effect; Evenly the section temperature distribution; The convenient annealing speed of regulating is eliminated product stress, has avoided the excessive product that causes of the interior the upper and lower of kiln, product limit portion and middle part and product surface and internal difference in temperature to produce problems such as being out of shape, bursting; Optimize the glass-ceramic plate annealing process, improved the quality of product.
The present invention is suitable for sectional space and is of a size of wide 1400mm～2200mm, and the glass ceramic tunnel crystallization kiln of high 1500mm～2500mm is suitable for firing 5～9 layers of glass-ceramic plate.Be particularly suitable for the annealing cooling of sintering process building decoration sytull.
Description of drawings
Fig. 1 is structural representation of the present invention (front view).
Fig. 2 is a cooling zone hot gas flow synoptic diagram of the present invention (vertical view).
Fig. 3 is A-A sectional drawing among Fig. 1 (a quench zone winding-up mouth).
Fig. 4 is B-B sectional drawing among Fig. 1 (a slow cooling section winding-up mouth).
Label among the figure: 1-quench zone, 2-cooling zone slow cooling section (850 ℃～550 ℃ intervals), 3-first cooling zone (500 ℃～250 ℃ intervals), 4-second cooling zone (250 ℃～150 ℃ intervals); 5-kiln tail cooling section, 6-kiln vehicle surface, 7-clinkering zone heat preservation zone; 8-chilling wind winding-up mouth, 9-chilling blower fan, 10-thermal cycling wind winding-up mouth; The heat-resisting recirculation blower of 11-, the heat-resisting recirculation blower air distribution outlet of 12-, the 13-first thermal cycling wind suction opening; The 14-second thermal cycling wind suction opening, 15-kiln tail cooling blower, 16-product are piled up zone (the cooling zone sytull is piled up the district); 17-representes the product working direction; 18-representes quench zone hot air circulation cooling draught working direction, and 19-representes slow cooling section hot air circulation cooling draught working direction, the 20-first hot air circulation pipe; The 21-second hot air circulation pipe; 22-kiln body, 23-chilling wind winding-up mouthful arm, 24-thermal cycling wind winding-up mouthful arm.
Embodiment
Below in conjunction with accompanying drawing and instance the present invention is further specified.
Like Fig. 1, Fig. 2, Fig. 3, shown in Figure 4; The annealing and the cooling treatment system of two sections hot air circulation of glass ceramic tunnel crystallization kiln; It comprises the annealing of tunnel crystallization kiln and the kiln body 22 of cooling treatment system; By the TR division quench zone 1, cooling zone slow cooling section 2, first cooling zone 3, second cooling zone 4, kiln tail cooling section 5 are arranged from clinkering zone heat preservation zone 7 to kiln tail outlet (promptly by product working direction 17) in the kiln body 22; 1120 ℃～950 ℃ intervals are that 1,850 ℃～550 ℃ intervals of quench zone are that 2,500 ℃～250 ℃ intervals, cooling zone slow cooling section are first cooling zone 3; 250 ℃～150 ℃ intervals are that 4,150 ℃～50 ℃ intervals of second cooling zone are kiln tail cooling section 5;
The top and the bottom of the both sides kiln wall of quench zone 1 are equipped with the chilling air port, and the chilling air port is connected with chilling wind arm, and all chilling wind arms are connected with the chilling airduct, and the chilling airduct is connected with the delivery port of chilling blower fan; The Yao Qiang top, both sides of quench zone 1 (kiln top with upper strata product between) and Yao Qiang bottom, both sides (between kiln vehicle surface 6 and the lower floor's product) are respectively installed row's chilling wind winding-up mouthfuls 8, the chilling wind of the chilling wind winding-up on Yao Qiang top, both sides mouthful and Yao Qiang bottom, the both sides mouth employing staggered arrangement form (as shown in Figure 1) of jetting; Chilling wind winding-up mouth 8 is connected with a chilling wind winding-up mouthful arm 23; Each chilling wind winding-up mouthful arm 23 is provided with regulated valve; All chilling wind winding-up mouthful arms 23 all are connected with the output port of the second hot air circulation pipe 21; The second hot air circulation pipe 21 is provided with chilling blower fan 9 and [extracts the warm air that second cooling zones 4 (250 ℃～150 ℃ intervals) are located by chilling blower fan 9, and spray into and force cooling in the kiln, form first section complete hot blast refrigeration cycle; On chilling wind winding-up mouthful arm, be provided with regulated valve, to regulate the cooling intensity here]; Quench zone length range 2m～8m;
Be respectively equipped with three heat extraction recirculating airs winding-up mouthful 10 (the wrong layouts of three heat extraction recirculating airs winding-up oral sex) on the both sides kiln wall of cooling zone slow cooling section 2; First heat extraction recirculating air winding-up mouth 10 is arranged in the upper end that product is piled up zone (dotted portion of Fig. 1) 16; Second heat extraction recirculating air winding-up mouth 10 is positioned at the middle part that product is piled up zone 16, and the 3rd heat extraction recirculating air winding-up mouth 10 is positioned at the bottom that product is piled up zone 16; Thermal cycling wind winding-up mouth is connected with a thermal cycling wind winding-up mouthful arm; A thermal cycling wind winding-up mouthful arm is provided with regulated valve; All thermal cycling wind winding-up mouthful arms all are connected with the output port of the first hot air circulation pipe 20, and the first hot air circulation pipe 20 is provided with heat-resisting recirculation blower 11, and (input terminus of heat-resisting recirculation blower 11 is provided with heat-resisting recirculation blower air distribution outlet 12; Extract the warm air at 3 places, 500 ℃～250 ℃ intervals of cooling zone by heat-resisting recirculation blower 11, and spray into and carry out the product cooling of slowly annealing in the kiln, form another section complete hot air circulation); Length range 16m～the 30m of cooling zone slow cooling section 2;
Be respectively equipped with three on the both sides kiln wall of first cooling zone 3 and ranked first thermal cycling wind suction opening 13 (three ranked first thermal cycling wind suction opening 13 staggered arrangement); First ranked first thermal cycling wind suction opening 13 is positioned at the upper end (direction) that product is piled up zone 16; Second ranked first thermal cycling wind suction opening 13 is positioned at the middle part (direction) that product is piled up zone 16, and the 3rd ranked first thermal cycling wind suction opening 13 is positioned at the bottom (direction) that product is piled up zone 16; The first thermal cycling wind suction opening 13 is connected with the first thermal cycling wind suction opening arm; The first thermal cycling wind suction opening arm is provided with regulated valve and (extracts flow out with the control interval warm air; Regulate section temperature; The adjustment rate of cooling), all first thermal cycling wind suction opening arms all are connected with the input port of the first hot air circulation pipe 20; This burst length scope 16m～36m;
Be respectively equipped with three on the both sides kiln wall of second cooling zone 4 and ranked second thermal cycling wind suction opening 14 (three ranked second thermal cycling wind suction opening 14 staggered arrangement); First ranked second thermal cycling wind suction opening 14 is positioned at the upper end (direction) that product is piled up zone 16; Second ranked second thermal cycling wind suction opening 14 is positioned at the middle part (direction) that product is piled up zone 16; The 3rd ranked second thermal cycling wind suction opening 14 is positioned at the bottom (direction) that product is piled up zone 16; The second thermal cycling wind suction opening 14 is connected with the second thermal cycling wind suction opening arm, and the second thermal cycling wind suction opening arm is provided with regulated valve and (extracts flow out with the control interval warm air, regulate section temperature; The adjustment rate of cooling), all second thermal cycling wind suction opening arms all are connected with the input port of the second hot air circulation pipe 21; This burst length scope 6m～16m;
Be respectively equipped with kiln tail cooling vent on the both sides kiln wall of kiln tail cooling section 5; Kiln tail cooling vent is connected with kiln tail cooling vent arm; Kiln tail cooling vent arm is provided with regulated valve; All kiln tail cooling vent arms all are connected with the output port of kiln tail cooling tube, and the input port of kiln tail cooling tube is connected with the output port of kiln tail cooling blower 15.
Effect is relatively: adopt the annealing and the cooling treatment system of existing glass ceramic tunnel crystallization kiln, have 20%～30% product quality problems such as being out of shape, bursting to occur.And behind employing the present invention, the distortion of product, burst and other defects are controlled in 5%, and the present invention has obviously improved the quality of product.
Claims (2)
1. the annealing and the cooling treatment system of two of glass ceramic tunnel crystallization kiln sections hot air circulation; It comprises the annealing of tunnel crystallization kiln and the kiln body (22) of cooling treatment system; By the TR division quench zone (1), cooling zone slow cooling section (2), first cooling zone (3), second cooling zone (4), kiln tail cooling section (5) are arranged from the outlet of clinkering zone heat preservation zone (7) to kiln tail in the kiln body (22); 1120 ℃～950 ℃ intervals are quench zone (1), and 850 ℃～550 ℃ intervals are cooling zone slow cooling section (2), and 500 ℃～250 ℃ intervals are first cooling zone (3); 250 ℃～150 ℃ intervals are second cooling zone (4), and 150 ℃～50 ℃ intervals are kiln tail cooling section (5); Be respectively equipped with kiln tail cooling vent on the both sides kiln wall of kiln tail cooling section (5); Kiln tail cooling vent is connected with kiln tail cooling vent arm; Kiln tail cooling vent arm is provided with regulated valve; All kiln tail cooling vent arms all are connected with the output port of kiln tail cooling tube, and the input port of kiln tail cooling tube is connected with the output port of kiln tail cooling blower (15); It is characterized in that:
Row's chilling wind winding-up mouth (8) is respectively installed in the Yao Qiang top, both sides of quench zone (1) and Yao Qiang bottom, both sides, the chilling wind winding-up mouth on Yao Qiang top, both sides and the chilling wind winding-up of Yao Qiang bottom, both sides mouthful employing staggered arrangement form; Chilling wind winding-up mouthful (8) is connected with a chilling wind winding-up mouthful arm (23); Each chilling wind winding-up mouthful arm (23) is provided with regulated valve; All chilling wind winding-up mouthful arms (23) all are connected with the output port of the second hot air circulation pipe (21), and the second hot air circulation pipe (21) is provided with chilling blower fan (9);
Be respectively equipped with three heat extraction recirculating airs winding-up mouthful (10) on the both sides kiln wall of cooling zone slow cooling section (2); First heat extraction recirculating air winding-up mouthful (10) is positioned at the upper end that product is piled up zone (16); Second heat extraction recirculating air winding-up mouthful (10) is positioned at the middle part that product is piled up zone (16), and the 3rd heat extraction recirculating air winding-up mouthful (10) is positioned at the bottom that product is piled up zone (16); Thermal cycling wind winding-up mouth is connected with a thermal cycling wind winding-up mouthful arm; A thermal cycling wind winding-up mouthful arm is provided with regulated valve; All thermal cycling wind winding-up mouthful arms all are connected with the output port of the first hot air circulation pipe (20), and the first hot air circulation pipe (20) is provided with heat-resisting recirculation blower (11);
Be respectively equipped with three on the both sides kiln wall of first cooling zone (3) and ranked first thermal cycling wind suction opening (13); First ranked first thermal cycling wind suction opening (13) is positioned at the upper end that product is piled up zone (16); Second ranked first thermal cycling wind suction opening (13) is positioned at the middle part that product is piled up zone (16), and the 3rd ranked first thermal cycling wind suction opening (13) is positioned at the bottom that product is piled up zone (16); The first thermal cycling wind suction opening (13) is connected with the first thermal cycling wind suction opening arm, and the first thermal cycling wind suction opening arm is provided with regulated valve, and all first thermal cycling wind suction opening arms all are connected with the input port of the first hot air circulation pipe (20);
Be respectively equipped with three on the both sides kiln wall of second cooling zone (4) and ranked second thermal cycling wind suction opening (14); First ranked second thermal cycling wind suction opening (14) is positioned at the upper end that product is piled up zone (16); Second ranked second thermal cycling wind suction opening (14) is positioned at the middle part that product is piled up zone (16); The 3rd ranked second thermal cycling wind suction opening (14) is positioned at the bottom that product is piled up zone (16); The second thermal cycling wind suction opening (14) is connected with the second thermal cycling wind suction opening arm, and the second thermal cycling wind suction opening arm is provided with regulated valve, and all second thermal cycling wind suction opening arms all are connected with the input port of the second hot air circulation pipe (21).
2. the annealing and the cooling treatment system of two of glass ceramic tunnel crystallization kiln according to claim 1 sections hot air circulation, it is characterized in that: the input terminus of described heat-resisting recirculation blower (11) is provided with heat-resisting recirculation blower air distribution outlet (12).
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| CN2010101903657A CN101880124B (en) | 2010-05-28 | 2010-05-28 | Annealing and cooling treatment system for two-stage hot wind circulation of glass ceramic tunnel crystallization kiln |
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| CN2010101903657A CN101880124B (en) | 2010-05-28 | 2010-05-28 | Annealing and cooling treatment system for two-stage hot wind circulation of glass ceramic tunnel crystallization kiln |
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| CN101880124B true CN101880124B (en) | 2012-11-07 |
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| CN107867794A (en) * | 2017-12-21 | 2018-04-03 | 九江金凤凰装饰材料有限公司 | A kind of subsequent annealing kiln |
| CN109341333B (en) * | 2018-10-16 | 2024-02-09 | 佛山市科达机电有限公司 | Roller kiln device for large-size foamed ceramics |
| CN112066720B (en) * | 2020-08-04 | 2022-09-23 | 广东摩德娜科技股份有限公司 | Cooling method for quenching section of tunnel kiln and tunnel kiln control device |
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